Low emission receptacles

ABSTRACT

Low emission nozzles and receptacles are disclosed. A receptacle includes a main body, a first stem, a first poppet connected to the first stem, a valve seat disposed in the main body, a first spring configured to bias the first poppet to a first closed position, a second stem slidingly engaged to the first poppet and the first stem, a second poppet connected to the second stem, and a second spring configured to bias the second poppet to a second closed position.

PRIORITY CLAIM

The present application is a continuation of U.S. patent applicationSer. No. 17/453,074, filed on Nov. 1, 2021, which is a continuation ofU.S. patent application Ser. No. 17/109,940, now U.S. Pat. No.11,162,641, filed on Dec. 2, 2020, which is a continuation of U.S.patent application Ser. No. 16/538,534, now U.S. Pat. No. 10,883,665,filed on Aug. 12, 2019, which is a continuation of U.S. patentapplication Ser. No. 15/368,360, now U.S. Pat. No. 10,386,017, filed onDec. 2, 2016, which claims the benefit of U.S. Provisional App. No.62/307,195, filed on Mar. 11, 2016, and U.S. Provisional App. No.62/262,749, filed on Dec. 3, 2015. These prior applications are herebyincorporated by reference in their entireties.

TECHNICAL FIELD

The present application generally relates to nozzles configured todeliver pressurized fluid and receptacles configured to receivepressurized fluid.

BACKGROUND

Receptacles are designed to receive fluid from nozzles. Receptaclestransfer the received fluid into a connected storage tank. One exampleof a receptacle is a car gasoline port. One example of a nozzle is agasoline dispenser at a gas station. One example of a connected storagetank is a car gas tank. Some fluids, such as liquid natural gas (LNG),compressed natural gas (CNG), liquefied petroleum gas (LPG), amongothers, are transferred via specialized nozzles and receptacles.

LNG and LPG may be stored in liquid form at cryogenic temperatures(e.g., −150 degrees C. or −238 degrees F.). During the transferringprocess between nozzle and receptacle, a portion of LNG/LNG may heat upand vaporize into gas. This gas expands to occupy all accessible areasof the nozzle and receptacle. When the transferring process is complete,a portion of the vaporized gas will remain in the receptacle. When thenozzle is eventually disconnected from the receptacle, this remaininggas is often intentionally vented into ambient atmosphere.

CNG may be stored under high pressures. During the transferring processbetween nozzle and receptacle, CNG may expand and occupy all accessibleareas of the nozzle and receptacle. When the transferring process iscomplete, a portion of the gas will remain in the receptacle. When thenozzle is eventually disconnected from the receptacle, this remaininggas is often intentionally vented into ambient atmosphere.

Even when the remaining gas is intentionally vented from the receptacle,new gas will flow from the storage tank into the receptacle, thuspressurizing the receptacle. The next time a nozzle is inserted into thereceptacle, the remaining gas will oppose the insertion of the nozzle,thus making the coupling process physically difficult.

SUMMARY

Various embodiments of the present disclosure provide nozzles andreceptacles, which (a) minimize the amount of fluid vented intoatmosphere when the nozzles disconnect from the receptacles and/or (b)enable a low difficulty coupling process between the nozzles and thereceptacles.

A nozzle consistent with the present disclosure may be configured tooccupy a retracted position and an extended position. The nozzle mayinclude: (a) a nozzle main body; (b) a nozzle probe comprising a nozzleflat annular surface and a nozzle check sealing surface, the nozzleprobe defining a nozzle inner void, a nozzle check void, and one or morenozzle passageways leading from the nozzle inner void to the nozzlecheck void; (c) a nozzle check assembly disposed in the nozzle checkvoid, the nozzle check assembly comprising a nozzle check and a nozzlespring, the nozzle spring biasing the nozzle check assembly to a closedposition where the nozzle check sealingly engages the nozzle checksealing surface. When the nozzle check assembly is in the closedposition, the nozzle check may longitudinally extend beyond the flatannular surface.

A receptacle consistent with the present disclosure may include: (a) areceptacle main body defining a receptacle main inner void; (b) areceptacle spring seat disposed in the receptacle main body, thereceptacle spring seat defining a receptacle central void; (c) areceptacle stem at least partially disposed in the receptacle centralvoid of the receptacle spring seat, the receptacle stem being at leastpartially disposed in the receptacle main inner void; (d) a receptaclepoppet connected to the receptacle stem, the receptacle poppetcomprising a receptacle inner check sealing surface and defining areceptacle central inner check void; (e) a receptacle spring disposedbetween the receptacle spring seat and the receptacle poppet, thereceptacle spring at least partially occupying the receptacle main innervoid, the receptacle spring biasing the receptacle poppet to a closedposition; (f) a receptacle check assembly at least partially disposed inthe receptacle inner check void, the receptacle check assemblycomprising a receptacle check and a receptacle check spring, thereceptacle check spring biasing the receptacle check toward a closedposition where the receptacle check engages the receptacle inner checksealing surface, the receptacle check protruding from the poppet whenthe receptacle check is in the closed position.

A method consistent with the present disclosure may include: (a)equalizing pressure between the nozzle inner void and the receptaclemain inner void by pressing the nozzle check against the receptaclecheck to open the nozzle check and the receptacle check; (b) extendingthe nozzle into the receptacle such that the receptacle main bodysurrounds at least a portion of the nozzle probe; (c) flowing fluid fromthe nozzle inner void into the receptacle main inner void.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional plan view of a first nozzle partiallycoupled with a first receptacle.

FIG. 2 is an enlarged cross-sectional plan view of zone 2 of FIG. 1 .

FIG. 3 is a cross-sectional isometric view of the engagement between thefirst nozzle and the first receptacle.

FIGS. 4 to 7 illustrate a coupling sequence between the first nozzle andthe first receptacle.

FIG. 4 is a cross-sectional plan view of a first step of the couplingsequence where a poppet of the receptacle is closed and center checks ofthe poppet and receptacle are touching and closed.

FIG. 5 is a cross-sectional plan view of a second step of the couplingsequence where the poppet of the receptacle is closed and one or both ofthe center checks are open.

FIG. 6 is a cross-sectional plan view of a third step of the couplingsequence where the poppet of the receptacle is in an open position andboth of the center checks are open.

FIG. 7 is a cross-sectional plan view of a fourth step of the couplingsequence where the poppet of the receptacle is in a fully open positionand both of the center checks are open.

FIG. 8 is an enlarged cross-sectional plan view of zone 8 of FIG. 1 .

FIG. 9 is a cross-sectional plan view of a second receptacle.

FIGS. 10 to 12 illustrate a coupling sequence between a second nozzleand the second receptacle.

FIG. 10 is a cross-sectional plan view of a first step of the couplingsequence.

FIG. 11 is a cross-sectional plan view of a second step of the couplingsequence.

FIG. 12 is a cross-sectional plan view of a third step of the couplingsequence.

FIG. 13 is a cross-sectional plan view of a third receptacle.

FIG. 14 is a top plan view of the third receptacle.

FIG. 15 is a cross-sectional isometric view of the third receptacle.

FIG. 16 is a schematic cross-sectional view of a check assembly for thethird receptacle.

FIG. 17 is an isometric view of a nozzle having an electroniccontroller, both of which are integrated into a handle.

FIG. 18 is a cross-sectional view of a receptacle.

FIG. 19 is a top plan view of a packing of the receptacle.

FIG. 20 is a cross sectional view of the packing.

FIGS. 21 to 25 are cross sectional views of the receptacle coupling witha probe of a nozzle.

DETAILED DESCRIPTION

The invention is defined by the appended claims. The descriptionsummarizes aspects of some disclosed embodiments and should not be usedto limit the claims. Other embodiments are contemplated in accordancewith the techniques described herein, as will be apparent uponexamination of the following drawings and detailed description, and suchembodiments are within the scope of this application.

For a better understanding of the disclosure, reference may be made toembodiments shown in the drawings. The components in the drawings arenot necessarily to scale, and related elements may be omitted so as toemphasize and clearly illustrate the novel features described herein. Inaddition, system components can be variously arranged, as known in theart. In the figures, like referenced numerals may refer to like partsthroughout the different figures unless otherwise specified.

While the features, methods, devices, and systems described herein maybe embodied in various forms, there are shown in the drawings, and willhereinafter be described, some exemplary and non-limiting embodiments.Not all of the depicted components described in this disclosure may berequired, however, and some implementations may include additional,different, or fewer components from those expressly described in thisdisclosure. Variations in the arrangement and type of the components maybe made without departing from the spirit or scope of the claims as setforth herein. This specification is intended to be taken as a whole andinterpreted in accordance with the principles of the invention as taughtherein and understood by one of ordinary skill in the art.

Some features may be described using relative terms such as top, bottom,vertical, rightward, leftward, etc. It should be appreciated that suchrelative terms are only for reference with respect to the appendedFigures. These relative terms are not meant to limit the disclosedembodiments. More specifically, it is contemplated that the valvesdepicted in the appended figures will be oriented in various directionsin practice and that the relative orientation of features will changeaccordingly.

With reference to FIG. 17 , a fluid source assembly may include (a) asource tank (not shown), (b) a nozzle 801 and (c) a hose or conduit 850extending between the source tank and nozzle. One example of a fluidsource assembly is a natural gas filling station. Similarly, a fluiddestination assembly may include (a) a destination tank 870, (b) areceptacle 860, and (c) a hose or conduit (not shown) extending betweenthe destination tank and receptacle. One example of a fluid destinationassembly is a vehicle configured to store natural gas.

FIGS. 1 to 8 show first embodiments of a nozzle 200 and a receptacle300. Nozzle 200 is configured to couple with and decouple fromreceptacle 300. Upon complete coupling between nozzle 200 and receptacle300, fluid may flow from the source tank (not shown), through the sourcehose or conduit 850, through nozzle 200, through receptacle 300, througha destination hose or conduit (not shown), and into a destination tank870.

Nozzle 200 is configured to accept fluid from the source hose or conduit850 via inlet void 201 a and to expel the fluid into receptacle 300through one or more outlet voids 202 a (also called outlet ports). Inletvoid 201 a may be in constant fluid communication with outlet voids 202a, even prior to coupling between nozzle 200 and receptacle 300. In FIG.1 , fluid cannot access receptacle 300 via outlet voids 202 a becausenozzle 200 is only partially coupled with receptacle 300. In FIG. 7 ,fluid may access receptacle 300 via outlet voids 202 a because nozzle200 is fully coupled with receptacle 300.

With reference to FIGS. 1 to 8 , nozzle 200 includes a main body 201, aprobe 202, 203, 204, 205, 207, and a link or lever 206. The probeincludes a nozzle check assembly 207.

The probe is configured to slide or longitudinally translate/move withrespect to main body 201. The probe includes a spring seat 202 (alsocalled a body or a dispenser), a poppet engager 203 (also called a bodyor a plate), a packing 204, fasteners 205 securing spring seat 202 withpoppet engager 203, and nozzle check assembly 207.

Nozzle check assembly 207 is configured to equalize pressure of nozzlevoid 202 b (and other voids in fluid communication with nozzle void 202b) with receptacle void 301 e prior to complete coupling between nozzle200 and receptacle 300. Such pressure equalization advantageouslyreduces the amount of effort required to fully couple nozzle 200 withreceptacle 300, which is discussed in detail below.

Spring seat 202 is cylindrical and includes a first portion (notlabeled) and a second portion (not labeled). The first portion defines acylindrical central void 202 b and oval-shaped outlet voids 202 a (alsocalled outlet ports or window ports). Outlet voids 202 a may be anysuitable shape. The second portion defines a cylindrical central void202 c for accommodating nozzle check assembly 207 and a cylindricalcentral void 202 d for constantly fluidly communicating void 202 b withvoid 202 c.

Outlet voids 202 a may be windows defined through an outer perimeter ofspring seat 202 such that reference lines perpendicular to thelongitudinal axis of nozzle 200 and extending through each of outletvoids 202 a intersect a longitudinally centerline of void 202 b. Voids202 a, 202 b, 202 c, 202 d (and optionally void 201 a— if a nozzle valve(not shown) is disposed upstream of void 201 a e.g., in handle 800 or inhose 850) may be in constant fluid communication, both prior to andduring full coupling. As shown in FIGS. 1 and 2 , spring seat 202includes a step or shoulder (not labeled) defining an annular recess forreceiving packing 204.

Poppet engager 203 is cylindrical and defines a central void (notlabeled) for accommodating nozzle check assembly 207. As shown in FIG. 2, the central void includes a cylindrical portion (not labeled) and apartially conical portion (not labeled). Poppet engager 203 includes asealing surface 203 a (also called a valve seat) for nozzle checkassembly 207. Poppet engager 203 includes a ring-shaped andlongitudinally extending protrusion 203 b extending from one end.Protrusion 203 b contributes to defining the partially conical portionof the central void of poppet engager 203.

Packing 204 may include a circumferential spring 204 b. Operation ofcircumferential springs in packing material is discussed below withreference to FIGS. 18 to 25 . Spring 204 b is surrounded by packingmaterial (e.g., polymeric material) on three sides. A fourth side (i.e.,the side facing spring seat 202) is open (i.e., at least partially open)to enable fluid admission into circumferential spring 204 b. Prior tofull coupling, packing 204 is radially compressed between spring seat202 and main body 201. Packing 204 thus prevents fluid from leakingbetween main body 201 and spring seat 202 prior to full coupling. Uponfull coupling, and as shown in FIG. 7 , packing 204 no longer contactsmain body 201 and thus does not substantially effect fluid flow. Packing204 includes an inner portion 204 a, which is discussed below withreference to fasteners 205.

Fasteners 205 extend through poppet engager 203 and are threaded intoblind bores defined in spring seat 202. Fasteners 205 bind poppetengager 203 to spring seat 202. As shown in FIG. 2 , an inner portion204 a of packing 204 extends into an annular groove (not labeled)defined between poppet engager 203 and spring seat 202. Inner portion204 a is compressed or squeezed between poppet engager 203 and springseat 202 by virtue of fasteners 205. This compression or squeeze retainspacking 204 in the annular groove upon full coupling (FIG. 7 ), wheremain body 201 no longer exerts a radially inward force on packing 204.

Link or lever 206 may be moveable and/or rotatable (not shown) betweenan open position and a closed position. Link or lever 206 may beconfigured to actuate the two-way valve (not shown and previouslydiscussed) disposed in the source hose or conduit 850, the handle 800,or in nozzle 200. When the valve is open, fluid flows from the sourcehose or conduit to pressurize voids 201 a, 202 a, 202 b, 202 c, 202 d.Link or lever 206 may be configured to apply a longitudinal force onspring seat 202 to move main body 201, spring seat 202, and poppetengager 203 toward receptacle 300. As shown in FIG. 10 , nozzle 200(corresponding to nozzle 500 in FIG. 10 ) may include an outer body 506with one or more coupling arms 506 a. Instead of coupling arms 506 a,outer body 506 may include other kinds of couplers such as ballbearings. Coupling arms 506 a grip receptacle 300 to secure outer body506 with respect to receptacle 300. As shown in FIG. 10 , link or lever206 (which may correspond to link or lever 504 b of FIG. 10 ) may bepart of an assembly 504 including a force originator 504 a. Forceoriginator 504 a may apply a longitudinal force to link or lever 206 tolongitudinally translate main body 201, spring seat 202, and poppetengager 203.

As discussed below, main body 201 and spring seat 202 may be configuredto engage and disengage. When main body 201 and spring seat 202 areengaged, both features longitudinally translate as a unit. When mainbody 201 and spring seat 202 are disengaged, spring seat 202 maylongitudinally translate inside of, and with respect to, main body 201.As discussed below, one of main body 201 and spring seat 202 may includean annular tab or protrusion (not shown) and the other of main body 201and spring seat 202 may define an annular groove or recess for receivingthe annular tab (not shown). Additionally, and as discussed below, oneof outer body 506 and main body 201 may include a projection (not shown)and the other of outer body 506 and main body 201 may include a step orshoulder configured to contact the projection (not shown).

As link or lever 206 applies longitudinal force to spring seat 202 inthe direction of receptacle 300, spring seat 202 and main body 201longitudinally translate as a unit until main body 201 is stoppedagainst outer body 506 by virtue of the projection contacting the stepor shoulder. At this time, the annular tab may disengage from theannular groove or recess, thus enabling spring seat 202 to furtherlongitudinally translate while main body 201 remains stopped. Duringdecoupling, main body 201 may remain stopped until the annular tabengages the annular groove or recess. Upon engagement, main body 201 andspring seat 202 may retract from receptacle 300 as a unit.

As stated above, nozzle check assembly 207 is configured to engage areceptacle check assembly 307. Engagement equalizes nozzle fluidpressure with receptacle fluid pressure, which often reduces the effortrequired to fully couple nozzle 200 and receptacle 300. Morespecifically, prior to coupling, pressure in receptacle 300 (e.g.,pressure in receptacle void 301 e) is typically greater than pressure innozzle 200 (e.g., pressure in nozzle void 202 b). Because nozzle 200 isinserted into receptacle 300 during coupling (see FIG. 7 ), nozzle 200reduces the volume of receptacle void 301 e. Fluid in receptacle void301 e opposes this reduction in volume and thus opposes insertion ofnozzle 200 into receptacle 300.

Check assemblies 207, 307 reduce fluid pressure in receptacle void 301 eby transferring fluid in receptacle void 301 e to nozzle void 202 bprior to nozzle 200 reducing volume of receptacle void 301 e. As such,fluid in receptacle void 301 e is at a lower pressure and insertion ofnozzle 200 into receptacle 300 requires less force.

With reference to FIGS. 1, 2, and 8 , nozzle check assembly 207 isdisposed in centers of spring seat 202 and poppet engager 203. Nozzlecheck assembly 207 includes a check spring 208, a spring stop 209, acheck 210 (also called a poppet), and a seal assembly 211 (also called agroove and seal assembly).

Check spring 208 sits between spring seat 202 and spring stop 209. Checkspring 208 biases check 210 to a closed position where fluidcommunication is disabled between nozzle void 202 c and receptacle void306 a (or ambient atmosphere if receptacle 300 is absent). Spring stop209 defines a threaded blind bore (not labeled) through which check 210is disposed. Check 210 may be threaded into the blind bore.Alternatively, check 210 may be unfastened to spring stop 209 and theblind bore may be unthreaded. As shown in FIG. 2 , spring stop 209includes an outer annular flange 209 a directly disposed between checkspring 208 and an outer portion of check 210.

With reference to FIG. 8 , nozzle check 210 includes a cylindricalengaging portion 210 a, a partially conical aligning portion 210 b, anannular seal 210 c, and a cylindrical securing portion 210 d. Engagingportion 210 a is configured to engage receptacle check 310. Aligningportion 210 b, in conjunction with spring stop 209, is configured tocompress and retain seal 210 c thereby biasing seal 210 c intocompressive engagement with valve seat or sealing surface 203 a whennozzle check assembly 207 is closed. Securing portion 210 d isconfigured to sit within the blind bore defined in spring stop 209.Securing portion 210 d may be threadably received in, or otherwise fixedto, spring stop 209 to enhance compression of seal 210 c. Engagingportion 210 a, aligning portion 210 b, and securing portion 210 d may bemetallic while seal 210 c may be polymeric (e.g., a plastic).

Although FIG. 8 shows nozzle check 210 engaging receptacle check 310while seal assembly 211 is disengaged from receptacle 300, in practice,and as discussed below, seal assembly 211 at least partially engagesreceptacle 300 before nozzle check 210 and receptacle check 310 beginmoving.

Seal assembly 211 includes an annular seal affixed to the annularprotrusion of poppet engager 203. Seal assembly 211 is configured tosealingly and compressively engage a sealing surface 3060 of receptacle300 to discourage fluid leak between an interface gap 101 between nozzle200 and receptacle 300. As shown in FIG. 8 , a radially outward surfaceof seal assembly 211 may be slanted with respect to the longitudinalaxis to match sealing surface 3060, which may be similarly slanted withrespect to the longitudinal axis. Sealing surface 3060 may include aminor chamfer 3060 a disposed only about a portion of sealing surface3060. Minor chamfer 3060 a may draw sealing surface 211 toward sealingsurface 3060.

Nozzle 200 and/or receptacle 300 may be sized, dimension, and/orconfigured such that at least a portion of seal assembly 211circumferentially seals against at least a portion of sealing surface3060 before any of nozzle check assembly 207 and receptacle checkassembly 307 open. Nozzle 200 and/or receptacle 300 may be furthersized, dimension, and/or configured such that seal assembly 211 fullyseals (e.g., has sealed along the full longitudinal length of outerchamfer 211 a) after nozzle check assembly 207 has opened, but beforereceptacle check assembly 310 has opened. With reference to FIGS. 1 to 8, receptacle 300 includes a cylindrical main body 301, a spring seat302, a stem 303, a spring 304, a packing 305, a poppet 306, and areceptacle check assembly 307. As stated above, receptacle checkassembly 307 is configured to engage nozzle check assembly 207 toequalize pressure in receptacle void 301 e with pressure in nozzle void202 b prior to full coupling. During coupling, poppet 306 is configuredto disengage from main body 301 to enable nozzle 200 to enter receptaclevoid 301 e and thereafter release fluid into receptacle void 301 e viavoids 202 a. As explained below, nozzle 200 engages packing 305 toprevent leakage between nozzle 200 and receptacle 300.

Main body 301 includes a first portion 301 a threaded to a secondportion 301 b. As shown in FIG. 2 , packing 305 includes a radiallyoutward portion 305 a compressed and thereby retained between firstportion 301 a and second portion 301 b. An inner surface 3010 b ofsecond portion 301 b is smooth, cylindrical and configured to engage andadmit the smooth and cylindrical outer surface of nozzle main body 201.To improve admission of nozzle 200, the inner surface of second portion301 b and the outer surface of nozzle main body 201 may be polished toexcellent surface finishes, such that the inner surface of secondportion 301 b and the outer surface of nozzle main body 201 have highergrade surface finishes (i.e., are more polished) than other componentsin nozzle 200 and receptacle 300. First portion 301 a includes apartially conical valve seat or sealing surface 3010 configured tosealingly engage poppet 306. Main body 301 defines void 301 e fordirectly receiving fluid expelled from nozzle voids 202 a, as shown inFIG. 7 . Spring seat 302 defines a longitudinally extending centralcylindrical void (not labeled) for slidably receiving stem 303. Springseat 302 further defines a plurality of longitudinally extendingkidney-shaped outer voids 302 a (outer voids 302 a may be any suitableshape) for carrying fluid from void 301 e to the destination house orconduit. Spring seat 302 is fixed with respect to main body 301. Asshown in FIG. 3 , spring seat 302 may be integral with main body 301. Ifnon-integral with main body 301, spring seat 302 may be threaded orotherwise secured (not shown) to main body 301.

Stem 303 is configured to enable poppet 306 and thus check assembly 307to longitudinally move, slide, or translate with respect to main body301. Stem includes a cylindrical extension portion 303 a, a nut or stop303 b, and a head 303 c. Extension portion 303 a is configured to slidewithin the central void defined in spring seat 302. One end (notlabeled) of poppet 306 contacts nut or stop 303 b. Head 303 c has anouter diameter less than an outer diameter of nut or stop 303 b and maybe threaded into poppet 306. A longitudinal end of head 303 c is flatand serves as a seat for check spring 308.

According to some embodiments, the inner threads (not labeled) of poppet306 are longitudinally longer than head 303 c to enable user adjustmentof the position of head 303 c and thus compression of check spring 308.When head 303 c has been properly positioned, nut 303 b is locked intoposition to discourage movement of head 303 c along the inner threads ofpoppet 306. According to another embodiment, head 303 c is not threadedor otherwise affixed to poppet 306 and thus nut or stop 303 b preventspoppet 306 from sliding toward spring seat 302 along stem 303.

Spring 304 is directly disposed between spring seat 302 and poppet 306.Because spring seat 302 cannot move toward the destination hose orconduit (not shown, but disposed at the longitudinal end of body 301adjacent spring seat 302), spring 304 biases poppet 306 to a closedposition where poppet 306 sealingly engages valve seat or sealingsurface 3010.

Packing 305 includes outer radial and annular portion 305 acompressively retained between first and second portions 301 a, 301 b ofmain body 301. Packing 305 includes a circumferential spring 305 b Asstated above, circumferential springs are discussed below with referenceto FIGS. 18 to 25 . As with all circumferential springs disclosedherein, packing material (e.g., polymeric material) may surround threesides of circumferential spring 305 b, while one side (e.g., the side ofspring 305 b facing gap 305 c) is left open to enable fluid admissioninto spring 305 b.

Prior to coupling (not shown) and during some initial stages of coupling(see FIGS. 1 to 5 ), packing 305 is compressed between main body 301 andpoppet 306 to prevent fluid leakage between main body 301 and poppet306. As shown in FIGS. 6 and 7 , the cylindrical outer surface of nozzlemain body 201 eventually displaces poppet 306 from packing 305 andpacking 305 becomes compressed between receptacle main body 301 andnozzle main body 201. In this position, packing 305 prevents fluidleakage between receptacle main body 301 and nozzle main body 201.

Poppet 306 is configured to move, slide, or translate between (a) aclosed position where poppet 306 engages packing 305 (b) an openposition where poppet 306 is disengaged from packing 305. FIG. 1 showsthe closed position and FIG. 7 shows the open position. Poppet 306 mayinclude a partially conical inner surface 3060, chamfer 3061, and anannular groove 3062. Annular groove 3062 may be fluidly connected withone or more channels (not shown) defined in poppet 306, which enablefluid in receptacle void 301 e to reach the inside of circumferentialspring 305 b when poppet 306 is closed. Partially conical inner surface3060 may stop against inner surface 3010 of receptacle main body 306when poppet 306 is in the closed position.

Poppet 306 defines a partially conical void 306 a, a cylindrical void306 b, a cylindrical void 306 c, a main void 306 d with a firstpartially conical portion (not labeled) and a second cylindrical portion(not labeled), and a cylindrical void 306 e. As previously discussed,cylindrical void 306 e may be defined by threads for receiving headportion 303 c of stem 303. Voids 306 a to 306 e may be centrallydisposed in poppet 306 (i.e., central axes of the voids may be collinearwith a central axis of receptacle 300 and/or with a central axis ofpoppet 306). Poppet 306 may further define one or more communicatingvoids (e.g., cross drillings 480 of FIG. 10 ) fluidly communicating void306 d with void 301 e.

Poppet 306 includes an annular and partially conical valve seat orsealing surface 3063 for engaging check 310 and closing check assembly307. Poppet 306 includes a step or shoulder 3064 for stoppinglongitudinal movement of stem 303 toward check 310.

As stated above, receptacle check assembly 307 is configured to engagenozzle check assembly 207 to fluidly communicate receptacle void 301 ewith nozzle void 202 b. Such fluid communication often reduces pressurein receptacle void 301 e. As previously discussed, the inclusion ofreceptacle check assembly 307 and nozzle check assembly 207 representsan improvement over at least some known nozzles and receptacles.

According to some embodiments, force required to open a receptaclepoppet with a nozzle is determined by fluid force acting on thereceptacle poppet plus other forces (e.g., spring forces). Fluid forceacting on the receptacle poppet is equal to surface area of the poppetexposed to fluid multiplied by fluid pressure. After the receptacle hasbeen opened and the pressure between the receptacle and the nozzle hasequalized, the force required to further open the receptacle isdetermined by only the other forces (i.e., not fluid pressure acting onthe poppet).

According to some embodiments, receptacle check or poppet 310 has a muchsmaller surface area than receptacle poppet 306. As a result, the fluidforce acting on receptacle check or poppet 310 is much smaller than thefluid force acting on receptacle poppet 306. Embodiments of the presentdisclosure open receptacle check or poppet 310 before opening receptaclepoppet 306. Receptacle check or poppet 310, in conjunction with nozzlecheck or poppet 210, equalizes the pressure between nozzle andreceptacle. Therefore, a user needs oppose fluid force acting onreceptacle check or poppet 310 but does not need to oppose fluid forceacting on receptacle poppet 306. Because the force acting on receptaclecheck or poppet 310 is small compared with the fluid force acting onreceptacle poppet 306, the maximum amount of force that must be exertedduring the coupling process of disclosed embodiments is much smallerthan the maximum force required for existing designs.

With reference to FIGS. 1 to 8 , receptacle check assembly 307 (allcheck assemblies disclosed herein may be referred to as pilotassemblies) includes a check spring 308, a spring stop 309, and a check310 (all checks disclosed herein may be referred to as poppets orpilots). Check assembly 307 may be centrally disposed in poppet 306and/or main body 301 such that nozzle check assembly 207 is aligned withreceptacle check assembly 307 during the coupling process.

Check spring 308 is directly disposed between head portion 303 c of stem303 and spring stop 309. Check spring 308 biases check 310 into a closedposition where check 310 is in sealing engagement with valve seat orsealing surface 3063 of poppet 306. The closed position disables fluidcommunication of (a) voids 306 a, 306 b, and 306 c with (b) voids 306 d,306 e, and 301 e.

Spring stop 309 defines a threaded blind bore (not labeled) throughwhich check 310 is disposed. Check 310 may be threaded into the blindbore. Alternatively, check 310 may be unfastened to spring stop 309 andthe blind bore may be unthreaded. Spring stop 309, like spring stop 209,includes an outer annular flange (not labeled) directly disposed betweencheck spring 308 and an outer portion of check 310.

With reference to FIG. 8 , receptacle check 310 includes a cylindricalengaging portion 310 a, a partially conical aligning portion 310 b, anannular seal 310 c, and a cylindrical securing portion 310 d. Engagingportion 310 a is configured to engage nozzle check 210. A circularlongitudinal end (not labeled) of receptacle engaging portion 310 a mayhave the same surface area and diameter of the circular longitudinal end(not labeled) of nozzle engaging portion 210 a.

Aligning portion 310 b, in conjunction with spring stop 309, isconfigured to compress and retain seal 310 c, thereby biasing seal 310 cinto compressive contact with valve seat or sealing surface 3063 whenreceptacle check assembly 307 is closed. Securing portion 310 d sitswithin the blind bore defined in spring stop 309. Securing portion 310 dmay be threadably received in, or otherwise fixed to, spring stop 309 toenhance compression of seal 310 c. Engaging portion 310 a, aligningportion 310 b, and securing portion 310 d may be metallic while seal 310c may be polymeric (e.g., a rubber, a plastic).

To simplify manufacturing, spring stop 309 and check 310 of receptacle300 may be identical to spring stop 209 and check 210 of nozzle 200.Receptacle check spring 308 may have a greater spring constant thannozzle check spring 208 to cause nozzle check assembly 207 to openbefore receptacle check assembly 307.

An exemplary coupling and decoupling of nozzle 200 with receptacle 300is described below with reference to FIGS. 4 to 7 . FIG. 4 shows a firstcoupling stage 100 a, which represents a beginning of the couplingprocess and an end of the decoupling or retracting process. FIGS. 1 to 3and 8 also show the first coupling stage 100 a. FIG. 5 shows a secondcoupling stage 100 b, which occurs after first coupling stage 100 aduring coupling and before first coupling stage 100 a during decoupling.FIG. 6 shows a third coupling stage 100 c, which occurs after secondcoupling stage 100 b during coupling and before second coupling stage100 b during decoupling. FIG. 7 shows a fourth coupling stage 100 d,which represents an end of the coupling process and a beginning of thedecoupling process. FIGS. 4 to 7 do not show movement of checkassemblies 207, 307.

As shown in FIG. 4 , a user inserts nozzle main body 201 into receptaclemain body 301. Although not shown in FIGS. 4 to 7 , an outer body 506 ofnozzle 200 latches to receptacle 300 to disable movement of receptacleouter body 301. As previously discussed, an example of the outer body506 is shown in FIG. 10 . In FIG. 10 , nozzle outer body 506 includesone or more latches (also called coupling arms) 506 a that bind nozzleouter body 506 to a receptacle main body.

Returning to FIG. 4 , nozzle check 310 may begin to engage receptaclecheck 310 or may be slightly spaced therefrom. As shown in FIG. 4 ,poppet engager 203 is spaced from poppet 306 by interface gap 101.Neither nozzle check 207 nor receptacle check 307 is open at this stage.The user continues to press nozzle main body 201 into receptacle mainbody 301 until seal assembly 211 circumferentially engages at least aportion of inner surface 3060 of poppet 306.

As previously discussed, spring seat 202 may include a radiallyoutwardly extending flexible tab (not shown) configured to engage anannular inner recess of nozzle main body 201 (not shown). Engagementbetween the flexible tab and the annular inner recess may cause mainbody 201 to longitudinally extend with spring seat 202 until main body201 contacts a hard stop (discussed above and further discussed below).At that point, the flexible tab may disengage from main body 201 toenable relative movement between spring seat 202 and main body 201.Alternatively, the flexible tab may radially inwardly extend from mainbody 201 into an outer radial recess defined in spring seat 202 (notshown).

Upon engagement of seal assembly 211 with inner surface 3060, receptaclecheck 310 forces nozzle check 210 open while receptacle check 310remains closed. More specifically, receptacle check 310 applies a firstforce against nozzle check 210 and nozzle check 210 applies a second,opposite force against receptacle check 310. Receptacle check 310transmits the first force to receptacle check spring 308, which appliesthe force to stem head portion 303 c. When stem head portion 303 c isthreaded into poppet 306, as is preferred, stem 303 does not move towardspring seat 302 by virtue of a counterforce applied by main spring 304to poppet 306 (which has a larger spring constant than receptacle checkspring 308). When stem head portion 303 c is not threaded into poppet306, another feature (not shown) prevents stem 303 from longitudinallysliding toward spring seat 302. This other feature may be a stopping tab(not shown) disposed in void 306 e or a moveable lever configured tooccupy a stopping position that arrests longitudinal movement of stem303 toward spring seat 302.

Because stem head portion 303 c is stopped and because the springconstant of receptacle check spring 308 exceeds the spring constant ofnozzle check spring 208, receptacle check 310 remains closed whilenozzle check 210 disengages from valve seat or sealing surface 203 a,thus opening nozzle check assembly 207. Fluid communication is nowenabled between nozzle void 202 b and receptacle void 306 b.

The user continues pressing nozzle 200 into receptacle 300 until poppetengager 203 contacts poppet 306. At a point in time prior to firmcontact between poppet engager 203 and poppet 306, nozzle check 210stops moving toward spring seat 202. The stop may be provided by anannular stop (not shown) disposed in spring seat 202. The stop may beprovided by the enhanced compression of nozzle check spring 208.

Although nozzle check 210 has stopped, the user continues pressingnozzle 200 into receptacle 300. By the point of firm contact betweenpoppet engager 203 and poppet 306, nozzle check assembly 207 appliessufficient force against receptacle check assembly 307 to overcome thebiasing force of receptacle check spring 308 and disengage receptaclecheck 310 from valve seat or sealing surface 3063. It should thus beappreciated that nozzle 200 and receptacle 300 are configured such thatnozzle check assembly 207 and receptacle check assembly 307 are bothopened prior to, or at the point of, firm contact between poppet engager203 and poppet 306.

Once both check assemblies 207, 307 have opened, fluid communicationbetween receptacle void 301 e and nozzle void 202 b is enabled by way ofreceptacle void 306 b. Fluid flows from receptacle void 301 e intonozzle void 202 b (or from nozzle void 202 b into receptacle void 301 eif fluid pressure in nozzle void 202 b exceeds fluid pressure inreceptacle void 301 e). Because fluid pressure in receptacle void 301 eis typically greater than fluid pressure in nozzle void 202 b, thepressure in receptacle void 301 e will typically decrease.

In FIGS. 5 to 7 , poppet engager 203 is firmly contacting poppet 306 andthus both of nozzle check assembly 207 and receptacle check assembly 307are open. As stated above, FIGS. 4 to 7 omit movement of nozzle checkassembly 207 and receptacle check assembly 307.

The user may wait for the pressure in receptacle void 301 e to fullyequalize with the pressure in nozzle void 202 b by maintaining theposition of FIG. 5 . Alternatively, the user may continue to insertnozzle 200 further into receptacle 300. Poppet engager 203 pushes poppet306 toward receptacle spring seat 302, causing surface 3060 of poppet306 to disengage from surface 3010 of receptacle main body 301. As shownin FIG. 6 , packing 305 continues to sealingly engage poppet 306.Eventually, as shown in FIG. 7 , poppet 306 disengages from packing 305while receptacle main body 201 engages packing 305. It should thus beappreciated that packing 305 is perpetually radially sealed against atleast one of poppet 306 and receptacle main body 201. An alternativeembodiment of packing 305 is discussed below with reference to FIGS. 18to 25 .

Nozzle main body 201 stops in the position of FIG. 6 . The stop may beprovided by a stopping feature (not shown) of nozzle 200 engaging acorresponding stopping feature (not shown) of receptacle 300. Withreference to FIG. 10 , the stop may be provided between engagementbetween nozzle main body 201 and the outer body 506 of nozzle 200(nozzle 200 corresponds to nozzle 500 in FIG. 10 ). More specifically,the outer body 506 may include an inner step or shoulder serving as astop for a radially outwardly extending flange of nozzle main body 201.Alternatively, the outer body 506 may include an outer step or shoulderserving as a stop for a radially inwardly extending flange of the nozzleouter body 506.

The user continues to press nozzle 200 into receptacle 300. Althoughnozzle main body 201 has been stopped in the position shown in FIGS. 6and 7 , spring seat 202, poppet engager 203, and link or lever 206continue to move toward receptacle spring seat 302, thus fullydisengaging poppet 306 from packing 305. Poppet engager 203, spring seat202, and link or lever 206 continue to move toward receptacle springseat 302 until nozzle voids 202 a are directly exposed to receptaclevoid 301 e. Nozzle 200 may include a stopping feature (not shown)preventing ingress of spring seat 202 past the position shown in FIG. 7. Upon full coupling of FIG. 7 , the user actuates lever or link 206 (oranother feature) to fluidly communicate nozzle void 202 b with thesource hose or conduit (not shown). Fluid now flows from nozzle 200 intoreceptacle 300. Decoupling occurs in the reverse order. Duringdecoupling, nozzle check assembly 207 and receptacle check assembly 307both remain open at least until poppet engager 203 is no longer in firmcontact with poppet 306. As a result, pressure in nozzle void 202 b istransferred into receptacle void 301 e, thus reducing the difficulty ofretracting spring seat 202 into nozzle main body 201. Receptacle checkassembly 307 closes before nozzle check assembly 207.

As shown in FIG. 8 , once seal assembly 211 disengages from innersurface 3060 of poppet 306, fluid disposed between nozzle 200 andreceptacle 300 in voids 306 a, 306 b, and 306 c vents into ambientatmosphere via interface gap 101. As such, a manufacturer may minimizevented fluid by reducing the size of voids 306 a, 306 b, and 306 c.According to preferred embodiments, the volumetric sum of fluid ventedinto atmosphere upon decoupling is less than 10, or 2 cubic centimeters.According to an especially preferred embodiment, the volumetric sum offluid is less than or equal to 1 cubic centimeter. Fluid vented duringdecoupling by existing receptacles is often 25 cubic centimeters.

FIG. 9 shows a second embodiment of a receptacle 400. FIGS. 10 to 12show a second embodiment of a nozzle 500 configured to couple withreceptacle 400. It should be appreciated that nozzle 500 of FIGS. 10 to12 may be include a nozzle check assembly (not shown and discussedbelow).

As shown in FIGS. 9 to 12 , receptacle 400 includes a main body 401, aspring seat 410, a first spring 415, a first stem 420, a first poppet425, a first valve seat 430, a packing 435, a second spring 440, asecond stem 445, a second poppet 450, a packing 460, and a checkassembly 470. Receptacle check assembly 470 is configured to operatesimilar to receptacle check assembly 307. More specifically, receptaclecheck assembly 470 is configured to engage nozzle check assembly (notshown, but similar to nozzle check assembly 207) to equalize pressure ofreceptacle 400 with pressure of nozzle 500.

Main body 401 includes a first portion 402 affixed (e.g., threaded orfastened) to a second portion 403 and a third portion 404 affixed (e.g.,threaded) to second portion 403. First portion 402 defines an outletport 405. Third portion 404 defines an inlet port 406.

Spring seat 410 may be threaded to first portion 402 or may be integralwith third portion 402. Spring seat 410 defines longitudinally extendingvoids 411 for enabling fluid flow across spring seat 410 and towardoutlet port 405. Spring seat 410 defines a central void (not labeled)for slidably receiving first stem 420. First spring 415 sits directlybetween spring seat 410 and poppet 425. First main spring 415 biasespoppet 425 to a closed position where poppet 425 sealingly andcompressively engages valve seat 430.

Stem 420 is affixed (e.g., integral or threaded) to poppet 425. Stem 420includes a cylindrical first portion 421 for moving or sliding withinspring seat 410. Stem 420 includes a cylindrical second portion 422 forstopping against spring seat 410 and thereby arresting longitudinaltranslation of stem 420 and poppet 425 toward outlet port 425.

Poppet 425 is affixed (e.g., integral or threaded) to poppet 425. Poppet425 defines an annular recess 426 for receiving first spring 415. Poppet425 includes a partially conical outer surface 427 for sealinglyengaging valve seat 430.

Stem 420 and poppet 425 define a longitudinally extending cylindricalblind bore 428 for slidably receiving second stem 445. First spring 425retains poppet 425 in the closed position until (a) second stem 445contacts inner stop 429 or (b) fluid pressure exerted on outer surfacesof poppet 425 biasing poppet 425 toward spring seat 410 exceed thebiasing force of first spring 415. According to a less preferred, butadvantageous embodiment, second stem 445 may be sized to never contactinner stop 429.

Valve seat 430 includes a cylindrical body 431 and an annular packing432. Annular packing 432 is retained in position by virtue of beingcompressed between cylindrical body 431 and first portion 402 of mainbody 401. Cylindrical body 431 is retained in position by virtue ofannular packing 432 and second spring 440. Alternatively, cylindricalbody 431 is threaded into second portion 402 of main body 401.

Annular packing 432 includes a first annular portion 432 a and a secondannular portion 432 b. First annular portion 432 a is compressed betweencylindrical body 431 and an inner ledge (not labeled) of second portion402 of main body 401. Second annular portion 432 b serves as a valveseat or sealing surface for first poppet 425.

Cylindrical body 431 defines inner voids 433 for enabling fluid flowfrom inlet port 406 to first poppet 425. Cylindrical body 430 includesan annular upper surface 434 a partially defining inner void 433 andserving as a seat for second spring 440. Cylindrical body 431 includesguiding portion 434 b defining a longitudinally extending cylindricalvoid (not labeled) for receiving second stem 445. Guiding portion 434 bprotrudes above annular upper surface 434 a.

Packing 435 is annular and sits in an annular recess defined in secondportion 403 of main body 401. Packing 435 is compressed between firstportion 402, second portion 403, and valve seat 430. Packing 435 thusdiscourages fluid leak (a) between the interface of first portion 402and second portion 403 and (b) between second portion 402 and valve seat430. Packing 435 may include a circumferential spring (not labeled) andthe packing may be configured to admit fluid into the circumferentialspring.

Second stem 445 is cylindrical and affixed (e.g., integral or threaded)to second poppet 450. Second spring 440 sits between valve seat 430 andsecond poppet 450. Because valve seat 430 is fixed in place, secondspring 440 biases second poppet 450 to a closed position.

Second poppet 450 includes an annular outer surface 451 configured toengage an outer annular protrusion 452 of second portion 403. Outerannular protrusion 452 thus serves as a secondary valve seat orsecondary sealing surface for second poppet 450. A primary valve seat orsealing surface (not labeled) may lie directly below protrusion 452.Although FIG. 9 shows second poppet 450 including an annular outwardprotrusion 453, protrusion 453 may be absent to enable poppet 450 tomove or slide toward outlet port 405. Alternatively, protrusion 453 maybe present and second poppet 450 may be polymeric, thus enabling mainbody protrusion 452 to inwardly compress poppet protrusion 453.

Poppet 450 defines a central blind bore (not labeled) for accommodatingcheck assembly 470. Poppet 450 includes an ring 454 fixed inside of thecentral blind bore. Ring 454 may be integral with poppet 450 or may bethreaded into the central blind bore. Poppet 450 defines cross drillings480 (see FIG. 10 ) fluidly communicating the central void with inletport 406.

As stated above, second spring 440 biases poppet 450 to a closedposition whereby poppet 450 sealingly engages main body protrusion 452.Because second stem 445 is affixed to second poppet 450, second spring440 biases stem 445 away from stop 429 of first stem and poppet 420,425.

Packing 460 includes an annular radially outwardly extending portion 461compressed and retained between second portion 403 and third portion404. Packing 460 includes a circumferential spring 462 biasing packing460 into compressive contact with an outer surface (not labeled) ofsecond poppet 450. As with all circumferential springs disclosed herein,circumferential spring 462 may be disposed in a pocket or groove definedin the packing material of packing 460, thus enabling fluid to occupyspring 462 (when spring 462 is exposed to fluid).

Receptacle check assembly 470 includes a check spring 471, a spring stop472, and a check 473. Check 473 may include some or all of the featuresof receptacle check 310. Check 473 may include a cylindrical engagingportion 473 a, a partially conical aligning portion (not shown), anannular seal 473 b, and a cylindrical securing portion (not shown). Thepartially conical aligning portion and the cylindrical securing portionmay resemble the corresponding features of receptacle check 310. Checkspring 471 biases annular seal 473 b of check 473 into sealingengagement with ring 454.

With reference to FIG. 10 , nozzle 500 includes a main body 501, adispenser 502, a poppet engager 503, a link assembly 504, a packing 505,and an outer body 506. Nozzle 500 is configured to engage receptacle 400and enable transmission of fluid from the source (not shown) intoreceptacle 400. Outer body 506 includes one or more couplers 506 a(e.g., latches or ball bearings) configured to secure receptacle 400with respect to outer body 506. A combination of dispenser 502, poppetengager 503, packing 505, and a nozzle check assembly (if present) maybe referred to as a probe. As stated above, outer body 506 is also usedto describe features of nozzle 200.

Main body 501 is annular and surrounds dispenser 502 and poppet engager503 prior to coupling and during a first coupling step 600 a, as shownin FIG. 10 . Although FIG. 10 only shows main body 501 surrounding oneside of dispenser 502 and poppet engager 503, main body 501circumferentially surrounds all sides of dispenser 502 and poppetengager 503.

Dispenser 502 is similar to spring seat 202 of nozzle 200. Dispenser 502defines outer voids 502 a and a cylindrical inner void 502 b. Outervoids 502 a are windows to inner void 502 b, similar to voids 202 a ofnozzle 200. Poppet engager 503 is a cylindrical plate secured todispenser 502. Poppet engager 503 includes a cylindrical protrusion 503a extending from a flat annular end 503 b.

Link assembly 504 includes force originator 504 a, a link or lever 503b, and a force applicator 504 c. Force applied to force originator 504 ais transmitted via link or lever 503 b to force applicator 504 c to movemain body 501 and/or dispenser 502. Force applicator 504 c is connectedto dispenser 502. Link or lever 206 of nozzle 200 may correspond to linkor lever 503 b of nozzle 500, such that nozzle 200 is longitudinallytranslated similar to nozzle 500.

Dispenser 502 may include an annular tab (not shown) and main body 501may define an annular groove (not shown) for the annular tab. Dispenser502 thus applies longitudinal force to main body 501 until main body 501reaches a maximum longitudinal extension (see FIGS. 11 and 12 ). Theannular tab may then disengage from the annular groove, thus enablingreceiver 502 to move or slide with respect to main body 501 (see FIG. 12).

Packing 505 may be configured similar to packing 204 of nozzle 200 andinclude (a) an annular inward portion (not labeled) compressed betweendispenser 502 and poppet engager 503 and (b) a circumferential spring(not shown) biasing packing 505 into compressive engagement with mainbody 501. As with all circumferential springs disclosed herein, thecircumferential spring of packing 505 may be only partially surroundedby packing material to enable fluid admission into the circumferentialspring.

Nozzle 500 may include a check assembly (not shown) similar to nozzlecheck assembly 207. Nozzle 500 may be configured to include some or allof the features of nozzle 200 shown in box 2 of FIG. 1 , includingnozzle check assembly 207. As a result, dispenser 502 may act as aspring plate for the check spring, similar to spring plate 202.Dispenser 502 may define voids fluidly communicating the nozzle checkassembly with inner void 502 b.

A coupling and de-coupling process will now be described with referenceto FIGS. 11, and 12 . With respect to the process, FIG. 10 shows a firststage 600 a. FIG. 11 shows a second stage 600 b. FIG. 12 shows a thirdstage 600 c. A coupling process between nozzle 500 and receptacle 400begins at first stage 600 a and ends at third stage 600 c. A decouplingor retraction process between nozzle 500 and receptacle 400 begins atthird stage 600 c and ends at first stage 600 a.

A user secures nozzle outer body 506 to receptacle 400 via one or morelatches 506 a. When nozzle 500 does not include a check assembly, theuser presses protrusion 503 a against receptacle check 473 before poppetengager 503 firmly engages poppet 450. Protrusion 503 a opens receptaclecheck 473. Fluid in inlet port 406 vents to ambient atmosphere via thegap between poppet engager 503 and poppet 450.

When nozzle 500 does include a check assembly, the user presses thenozzle check assembly against receptacle check assembly 470. Poppetengager 503 has not yet firmly engaged poppet 450. The nozzle checkassembly opens until the nozzle check stops (by virtue of a nozzle checkhard stop or a nozzle check spring). The nozzle check then forcesreceptacle check assembly open. Fluid communication between inlet port406 and nozzle inner void 502 b is now enabled.

Whether or not nozzle 500 includes a check assembly, the user continuesto press nozzle 500 against receptacle 400 until poppet engager 503firmly contacts poppet 450. The user may wait for pressure to equalize.When nozzle 500 includes a check assembly, the pressures fully orpartially equalize via the check assembly. It should be appreciated thatall check assemblies disclosed herein enable partial and/or fullequalization when matched with a reciprocal check assembly and held openfor a sufficient amount of time. When nozzle 500 does not include acheck assembly, the pressures may equalize as receptacle 400 vents fluidinto ambient, but not fully equalize.

As shown in FIG. 11 , nozzle main body 501, poppet engager 503, anddispenser 502 extend into receptacle 400. Receptacle packing 460 sealsagainst nozzle main body 501. Eventually, as shown in FIG. 12 , mainbody 501 stops while dispenser 502 and poppet engager 503 further extendinto receptacle 400. Main body 501 may be stopped by nozzle outer body506. For example, and as discussed with reference to nozzle 200, aflange radially outwardly extending from main body 501 may contact aninner shoulder or step of outer body 506 or a flange radially inwardlyextending from outer body 506 may contact an outer shoulder or step ofmain body 501.

A user places nozzle inner void 502 b in fluid communication with asource hose or conduit (e.g., by actuating a handle or pressing a buttonthat opens a two-way valve (not shown) disposed in the source hose orconduit or disposed at an end of nozzle 500). Fluid flows from nozzleinner void 502 b into receptacle inlet port 406. The fluid pressure inreceptacle inlet port 406 may open receptacle first poppet 425.Alternatively (not shown), second stem 445 may contact stopping surface429 to open first poppet 425. Fluid now flows from inlet port 406 tooutlet port 405 and into a destination hose or conduit. Decouplingoccurs in the reverse order.

Features or receptacles 300 and 400 may be swapped. More specifically,any feature of receptacle 300 may be added to, or replace, any featureof receptacle 400. Similarly, any feature of receptacle 400 may be addedto, or replace, any feature of receptacle 300.

For example, receptacle 300 may be modified: (a) to replace spring seat302 with valve seat 430, (b) to treat stem 303 as stem 445, (c) to addpoppet 425 in the arrangement shown in FIG. 9 , (d) to add spring seat410 as shown in FIG. 9 , (e) to reconfigure main body portion 301 a intoportions 402 and 403, as shown in FIG. 9 , and/or (f) to add packing435, as shown in FIG. 9 . One, some, or all of these modifications maybe implemented.

As another example, receptacle 400 may be modified: (a) to replace stem445 with stem 303 (although still arrange stem 303 inside first poppet425 and valve seat 430, as shown in FIG. 9 ), (b) to replace poppet 450with poppet 306, (c) to replace check assembly 470 with check assembly307, (d) to replace main body portion 404 with main body portion 301 bof main body 301, (e) to remove ring 454, and/or (f) to replace packing462 with packing 305. One, some, or all of these modifications may beimplemented.

As another example, features of receptacle 400 above replacement lineR-R may be replaced with features of receptacle 300 within box 2 of FIG.1 . Nut 303 b may also be added.

FIGS. 13 to 16 illustrate a third receptacle embodiment 700. Receptacle700 includes a main body 701, a first spring seat 710, a first spring715, a first stem 720, a first poppet 725, a valve seat 730, a secondspring seat 740, a second spring 745, a second stem 750, and a secondpoppet 760. Portions of at least second stem 750 and second poppet 760are not cross sectioned in FIG. 13 , as is apparent in the isometricview of FIG. 15 .

Main body 701 includes a first portion 702 threaded to a second portion703. Main body 701 defines a partially conical inlet port 701 a and acylindrical outlet port 701 b. Second portion 703 includes a flatannular surface 704 a and a partially conical surface 704 b, whichcooperate to define inlet port 701 a. Second portion 703 includes acylindrical surface 704 c for engaging an outer circumference of poppethead 761 and a partially conical surface valve seat or sealing surface704 d for sealingly engaging a compressive packing 762 of poppet 760.

First spring seat 710 defines a central internal void 711 for slidablyreceiving first stem 720. First spring seat 710 defines one or morevoids (not shown) enabling fluid flow across first spring seat 710(e.g., from first spring 715 to outlet 701 b). First spring seat 710 maybe threaded to main body 701. First spring seat 710 may be stoppedagainst an inner shoulder 712 of main body 701. First spring 715 isdirectly disposed between first spring seat 710 and first poppet 725.First spring 715 biases first poppet 725 to a closed position.

First stem 720 is secured to first poppet 725 (e.g., threaded orintegral). First stem 720 is configured to slide within central internalvoid 711. First stem includes a step or shoulder 721 configured to stopagainst first spring seat 710 to arrest longitudinal movement of firstpoppet 725 toward outlet 701 b. First stem 720 defines a central innerblind bore 722 for slidably receiving second stem 750.

First poppet 725 includes a partially conical sealing surface 726 forengaging valve seat 730 when first poppet 725 is in the closed position.First poppet 725 defines a portion of inner blind bore 722. First spring715 biases first poppet 725 to the closed position. First poppet 725opens in response to (a) fluid pressure inside valve seat 730 exceedingthe biasing force of first spring 715 or (b) second stem 750 contactinga longitudinal end of blind bore 722.

Valve seat 730 includes an outer packing 731, an inner packing 732, anda valve seat body 733. Outer packing 731 is compressed between valveseat 730 and main body 701. Inner packing 732 is retained in valve seat730 by virtue of major protrusion 732 a and minor protrusion 732 b.Major protrusion 732 a contacts three different first inner surfaces ofvalve seat 730. Minor protrusion 732 b contacts three different secondinner surfaces of valve seat 730. Major protrusion 732 a isperpendicular with respect to minor protrusion 732 b.

When in the closed position, first poppet 725 compressively engagesinner packing 732. Valve seat body 733 may be threaded to main body 701.Valve seat body 733 may be fixed with respect to main body 701 by virtueof opposing forces exerted by second spring 745 and outer packing 731.Valve seat 730 defines a cylindrical inner void (not labeled) forreceiving first poppet 725, second spring seat 740, and enabling fluidflow across valve seat 730.

Second spring seat 740 may be integral with valve seat 730.Alternatively, second spring seat 740 may rest on an inner shoulder orstep (not labeled) of valve seat 730 and thus be retained by virtue ofopposing forces from second spring 745 and valve seat 730. Second springseat 740 defines a central inner void (not labeled) for slidablyreceiving second stem 750. Second spring seat 740 defines one or morelongitudinally extending voids (not shown) for enabling fluid flowacross second spring seat 740.

One end of second spring 745 rests on second spring seat 740. Anopposing end of second spring seat 745 contacts second poppet 760.Second spring 745 biases second poppet 760 to a closed position. Secondstem 750 is secured (e.g., integral or threaded) to second poppet 760.Second stem 750 is slidably received in second spring seat 740, firstpoppet 725, and first stem 720.

Second poppet 760 includes a head 761, an annular seal or packing 762,and a guide 763. Head 761 may be metallic while annular packing 762 andguide 763 may be polymeric. When second poppet 760 is closed, head 761engages inner surface 704 c of main body 701 and seal 762 engages valveseat or sealing surface 704 d of main body 701. Guide 763 forms anannular pocket (not labeled) for receiving second spring 745. Guide 763includes an outer ring 763 a for engaging an inner cylindrical surfaceof main body to stabilize and longitudinally align second poppet 760when second poppet 760 is in the closed position and when second poppet760 is in an open position. Although not illustrated as such in FIG. 13, guide 763 is annular and symmetrical about its longitudinal axis.

An alternate embodiment of second poppet 760 is schematically shown inFIG. 16 . Second poppet 760 defines a central inner blind bore 764 forreceiving a check assembly 770. One or more voids (e.g., unshown crossdrillings 480) enable fluid communication between second spring 745 andblind bore 764. Check assembly 770 includes a check 771, a spring stop772, and a check spring 773. One end of check spring 773 contacts head761. An opposing end of check spring 773 contacts spring stop 772 tobias check 771 to a closed position. Check 771 includes a head 771 aoutwardly protruding from poppet head 761. Check 771 includes an annularpacking 771 b configured to contact an inner valve seat or sealingsurface 765 of second poppet 760. As with FIGS. 13 and 15 , FIG. 16 onlyshows one side of guide 763, although in practice, guide 763 may beannular and symmetrical about its longitudinal axis.

Check assembly 770 is configured to engage a reciprocal check assembly(not shown) of a nozzle. After an outer packing of the nozzle sealsagainst main body surface 704 a, 704 b, and/or 704 c, the reciprocalcheck assembly forces receptacle check assembly 770 open, thus enablingpressure equalization between the nozzle and receptacle 700. Afterpressure equalization has occurred, the nozzle pushes poppet head 761toward outlet 701 b and dispenses fluid into receptacle 700. Under thepressure of fluid or due to second stem 750 contacting the end of blindbore 722, first poppet 725 opens, enabling fluid to flow from the nozzleto outlet 701 b.

The operations discussed below may apply to (a) nozzle 200 andreceptacle 300, (b) nozzle 500 and receptacle 400, and/or (c) receptacle700.

As previously discussed, a fluid source assembly may include (a) asource tank, (b) nozzle 200, 500, and (c) a hose or conduit extendingbetween the source tank and nozzle. The fluid source assembly mayfurther include a pump disposed upstream of the nozzle.

A user may manually activate the pump to pressurize the hose or conduitwith fluid from the source tank. The pump may be automaticallyactivated, by a controller, when one or more sensors determine that thenozzle probe has translated a sufficient or predetermined length intoreceptacle 300, 400. The one or more sensors are thus configured todetermine an amount of extension of nozzle probe into the receptacle.The controller may delay the pump for a set amount of time (e.g., threeseconds) after the nozzle reaches the appropriate position within thereceptacle. Alternatively or in addition, a controller may only enableactivation of the pump once the above-described distance and/or timeconditions have been satisfied. The controller may controller the forceapplied by force originator 504 a to lever 206, 504. With respect to thesecond embodiment (i.e., nozzle 500 and receptacle 400), the controllermay disable withdrawal of nozzle 500 until first poppet 425 is detected,by one or more sensors, to be closed.

Nozzle 200, 500 may include various sensors and controls. The nozzle maybe electrically grounded, enabling components thereof such as the poppetengager and/or the outer walls of nozzle to electrically ground thereceptacle. The controller may confirm, with reference to one or moresensors, that the nozzle and receptacle have been electrically groundedbefore allowing the check assemblies of the nozzle and/or receptacle tomove from their closed positions. The controller may confirm, withreference to one or more sensors, that the nozzle and receptacle havebeen electrically grounded before allowing the poppet engager to contactthe poppet and/or before allowing the checks to touch. Leak sensors maybe disposed in the nozzle to detect an undesirable flow of fluid priorto engagement with the receptacle. Leak sensors disposed around thenozzle or receptacle may detect fluid leaking past any of the annularseals.

The nozzle may also include cycle count and service sensors such as RFIDtags that enable the controller to track how many times the nozzle hasengaged a receptacle. The receptacle may include a similar feature. Thenozzle may include a solenoid or pneumatically operated lock tomechanically actuate the link or lever.

With reference to FIG. 17 , a filling handle 800 is connected to asource hose or conduit 850, which is connected to a source tank (notshown). Filling handle 800 is coupled with receptacle 860, which isconnected to tank 870 via a hose or conduit (not shown). Receptacle 860includes a main body 861. Handle 800 includes a nozzle 801, an arm 802,a handle 803, LEDs 804, and buttons 805. Nozzle 801 may be any of theabove-described nozzles. Receptacle 860 may be any of theabove-described receptacles. Only the outer body of nozzle 801 is shown.Arm 802 is mechanically connected with the nozzle link or lever and isalso mechanically connected with a motor configured to drive arm 802.Nozzle outer body may be an integrated grounding connection. LEDs 804indicate a status of engagement between the nozzle and the receptacle.

For example, a first lighting pattern may indicate a pressureequalization process occurring between nozzle and receptacle checkassemblies. A second lighting pattern may indicate the nozzle probecontacting the receptacle poppet. A third lighting pattern may indicatethe nozzle probe being fully extended. A fourth lighting pattern mayindicate fluid flow occurring between the nozzle and the receptacle. Afifth lighting pattern may indicate that the receptacle poppet hasclosed and that the nozzle is ready to be removed from the receptacle.

A first button 805 a may activate the pump (subject to theabove-described conditions). A second button 805 b may deactivate thepump. A third button 805 c may cause the motor to move the arm 802toward the receptacle to extend the nozzle (subject to theabove-described conditions). A fourth button 805 d may cause the motorto withdraw the nozzle (subject to the above-described conditions).

FIGS. 18 to 25 illustrate an alternative embodiment of a packing. Withreference to FIG. 18 , receptacle 900 (which may correspond to anyreceptacle disclosed herein, including receptacles 300 and 400) includes(a) a main body 901 having a first portion 902, a second portion 903,and a third portion 904, (b) a longitudinally moveable or sliceablepoppet 905, and (c) a packing 906. Packing 906 serves as a valve seatfor poppet 905.

With reference to FIGS. 19 and 20 , packing 906 includes a firstcircumferential spring 907 a, a second circumferential spring 907 b, acylindrical spring housing 908, and a ringed protrusion or projection909. Springs 907 a, 907 b may be (a) neutral and/or energized, or (b)radially inwardly biased and/or energized, or (c) radially outwardlybiased and/or energized. When neutral, springs 907 a, 907 b may bothradially inwardly bias packing material and radially outwardly biaspacking material.

Protrusion 909 includes a first ring 909 a, a second ring 909 b, and athird ring 909 c. First and second rings 909 a, 909 b may be integralwith spring housing 908. Third ring 909 c may be non-integral with firstand second rings 909 a or may be fully integral. As shown in FIG. 19 ,third ring 909 c may slightly radially outwardly protrude from anannular groove (not labeled) defined between first and second rings 909a, 909 b, in which third ring 909 c is seated. Protrusion may be locatedequidistant from each spring 907 a, 907 b. Protrusion may be locatedcloser to one spring 907 a, 907 b than the other spring 907 b, 907 a.Spring housing 908 and retainer 909 may be packing material (e.g.,polymer).

Spring housing 908 may define two three-sided annular grooves or pockets(not labeled), which receive first and second springs 907 a, 907 b. Aswith all circumferential springs disclosed herein, one side of eachspring 907 a, 907 b may be exposed (i.e., at least partially exposed) bythe annular grooves or pockets to enable fluid flow into springs 907 a,907 b. This fluid flow further energizes springs 907 a, 907 b, enhancingcompression provided by springs 907 a, 907 b.

Each spring 907 a, 907 b may have a thickness (the thickness being thedifference between the outer radius of each spring and the inner radiusof each spring) greater than a thickness of the three-sided grooves orpockets before insertion of springs 907 a, 907 b therein to generate aninterference fit between springs 907 a, 907 b and the grooves orpockets.

With reference to FIGS. 21 to 25 , portions 902 and 903 of receptaclemain body 901 are threaded together to compress protrusion 909.Compression of first and second rings 909 a, 909 b retains springhousing 908 in place. Compression of third ring 909 c induces radialexpansion of third ring 909 c, thus generating an a first outercircumferential seal 943 between main housing portion 903 and packing906. The interference fit between springs and the grooves or pocketsgenerates second and third outer circumferential seals 944 and 945.Similarly, the inward bias of springs 907 a, 907 b and/or theinterference fit generates first and second inner circumferential seals941, 942 between packing 906 and poppet 905.

FIGS. 21 to 25 illustrate a coupling process, including first, second,third, and fourth stages 970 a, 970 b, 970 c, 970 d between receptacle900 and a generic nozzle 960 having a probe 961. A decoupling processoccurs in the reverse order. At first stage 970 a, an outer body (notshown) of nozzle 960 is latched to receptacle 900. Probe 961 beginstouching receptacle poppet 905. Both inner circumferential seals 941,942 bear on poppet 905. At second stage 970 b, probe 961 has pushedpoppet 905 a small longitudinal distance. Poppet 905 is still closedbecause poppet 905 is engaged with packing 906 via first inner seal 941.Poppet is no longer engaged with second inner seal 942.

At third stage 970 c, probe 961 has pushed poppet 905 a mediumlongitudinal distance. Poppet 905 is still closed because poppet 905 isengaged with packing 906 via first inner seal 941. Second inner seal 942has now engaged probe 961, thus preventing fluid from leaking betweenmain body 901 and probe 961. At fourth stage 970 d, poppet 905 is nolonger engaged with packing 906 and is thus open. Nozzle 961 has pushedpoppet 905 a large distance. First inner seal 941 is absent. At fifthstage 970 e, both first and second inner seals 941, 942 are engaged withprobe 961. Probe 961 has pushed poppet 905 a maximum distance. A usermay open nozzle 961 to flow fluid F into receptacle 900. Decouplingoccurs in the reverse order.

Packing 906 may replace some or all of the following packings: packing204, packing 305, packing 460, packing 505. Packing 906 may only replacepackings configured to contact both a nozzle and a receptacle. Whenpacking 906 replaces one of the previously described packings, springs907 a, 907 b may be (a) neutral and/or energized, (b) radially inwardlybiased and/or energized, or (c) radially outward biased and/orenergized. As stated above, when springs 907 a, 907 b are neutral and/orenergized, springs 907 a, 907 b may outwardly bear (due to theinterference fit) on the groove or slot. When packing 906 replaces oneof the previously described packings, the features retaining the packing(e.g., the main bodies, the probes, etc.) may be reconfigured to retainpacking 906. For example, main body portions 301 a, 301 b may bereconfigured to grip protrusion 909 in the manner shown FIG. 21 .Alternatively or in addition, when packing 906 replaces one of thepreviously described packings, the poppet (e.g., poppet 306) may bereconfigured, in conjunction with the features retaining the packing(e.g., the main bodies) to enable the poppet to contact a longitudinalend of packing 906 when the poppet is fully closed, as is shown in FIG.21 where poppet 905 longitudinally contacts packing 906 at spring 907 b.Although such a longitudinal contact feature may advantageous, it is notespecially preferred.

It should thus be appreciated that the present application discloses thefollowing embodiments.

Disclosed is a nozzle for dispensing fluid, the nozzle being configuredto occupy a retracted position and an extended position, the nozzlecomprising: a main body; a probe comprising a flat annular surface and acheck sealing surface, the probe defining an inner void, a check void,and one or more passageways leading from the inner void to the checkvoid; and a check assembly disposed in the check void, the checkassembly comprising a check and a spring, the spring biasing the checkassembly to a closed position where the check sealingly engages thecheck sealing surface, wherein when the check assembly is in the closedposition, the check longitudinally extends beyond the flat annularsurface.

According to some embodiments, the probe comprises a poppet engager anda spring seat and the flat annular surface has an outer diameter equalto an outer diameter of the nozzle.

According to some embodiments, the check assembly comprises a sealassembly annularly disposed about the check.

According to some embodiments, the seal assembly is disposed beyond theflat annular surface.

According to some embodiments, the check assembly is in the closedposition, the check extends beyond the seal assembly.

According to some embodiments, when the nozzle is in the retractedposition, the main body circumferentially surrounds a first portion ofthe probe.

According to some embodiments, when the nozzle is in the extendedposition, the main body circumferentially surrounds a second portion ofthe probe, the second portion being less than the first portion.

According to some embodiments, the nozzle includes an outer bodycomprising one or more latches configured to bind the outer body to areceptacle, wherein the main body is moveable with respect to the outerbody.

According to some embodiments, the nozzle transitions between theretracted position and the extended position, the main body translates afirst distance and the probe translates a second distance, the seconddistance exceeding the first distance.

According to some embodiments, one of the main body and the probecomprises one or more flexible tabs configured to engage one or morerecesses defined in the other of the main body and the probe.

According to some embodiments, the one or more flexible tabs areconfigured to occupy an engaged position where the one or more flexibletabs occupy the one or more recesses and a disengaged position where theone or more flexible tabs do not occupy the one or more recesses.

According to some embodiments, when the one or more flexible tabs are inthe engaged position, the one or more flexible tabs cause the main bodyand the probe to translate as a common unit and wherein the nozzle isconfigured such that the one or more flexible tabs disengage before thenozzle reaches the extended position.

According to some embodiments, an outer perimeter of the probe at leastpartially defines one or more outlet voids, each of the one or moreoutlet voids being in constant fluid communication with the inner void,the main body covering each of the one or more outlet voids when thenozzle is in the retracted position and at least a portion of the one ormore outlet voids protruding from the main body when the nozzle is inthe extended position.

According to some embodiments, the nozzle is configured such that as thenozzle moves from the retracted position to the extended position, themain body and the probe move together as a common unit until reaching afirst distance and after the first distance, the probe moves withrespect to the main body.

According to some embodiments, the probe comprises an annular protrusiondisposed in a center of the flat annular surface and the check assemblycomprises a seal assembly disposed on the annular protrusion.

According to some embodiments, an outer diameter of the seal assemblyexceeds an outer diameter of the annular protrusion.

According to some embodiments, the nozzle includes an annular packingdisposed in an outer groove defined in the probe, the annular packingcomprising a packing material and circumferential spring disposed in agroove defined in the packing material, the circumferential springbiasing the packing material radially outward toward the main body.

According to some embodiments, the probe comprises one or morefasteners, the one or more fasteners causing the probe to compress atleast a portion of the annular packing.

According to some embodiments, when the nozzle is in the retractedposition, the annular packing is compressed between the probe and themain body and when the nozzle is in the extended position, the annularpacking is not compressed by the main body.

According to some embodiments, the nozzle includes an annular packingdisposed in an outer groove defined in the probe, the annular packingcomprises a cylindrical spring housing defining two annular spring slotsand a central inner void, a ringed protrusion extending from thecylindrical spring housing, and two circumferential springs disposed inthe annular spring slots.

According to some embodiments, the nozzle includes a packing for sealinga fluid conduit, the packing comprising: a packing housing defining alongitudinally extending inner void and two annular spring grooves; aringed projection extending from the packing housing; twocircumferential springs disposed in the annular spring grooves.

Disclosed is a receptacle comprising: a main body defining a main innervoid; a spring seat disposed in the main body, the spring seat defininga central void; a stem at least partially disposed in the central voidand at least partially disposed in the main inner void; a poppetconnected to the stem, the poppet comprising an inner check sealingsurface and defining a central inner check void; a spring disposedbetween the spring seat and the poppet, the spring at least partiallyoccupying the main inner void, the spring biasing the poppet to a closedposition; a check assembly at least partially disposed in the innercheck void, the check assembly comprising a check and a check spring,the check spring biasing the check toward a closed position where thecheck engages the inner check sealing surface, the check protruding fromthe poppet when the check is in the closed position.

According to some embodiments, the receptacle includes a packing forsealing a fluid conduit, the packing comprising: a packing housingdefining a longitudinally extending inner void and two annular springgrooves; a ringed projection extending from the packing housing; twocircumferential springs disposed in the annular spring grooves.

According to some embodiments, the receptacle includes an annularpacking, the annular packing comprising packing material and acircumferential spring housed in the packing material, the annularspring biasing the packing material radially inward.

According to some embodiments, when the poppet is in the closedposition, the packing is compressed between the poppet and the mainbody.

According to some embodiments, the annular packing comprises at leasttwo circumferential springs housed in the packing material.

According to some embodiments, when the poppet is an open position, thepacking does not contact the poppet.

According to some embodiments, the poppet comprises a flat annular endsurface.

According to some embodiments, the poppet defines a first central voidextending to the flat annular end surface.

According to some embodiments, the poppet defines a second central voidextending between the inner check void and the first central void.

According to some embodiments, when the check is in an open position,the first central void, the second central void, and the main inner voidare in fluid communication.

Disclosed is a method of coupling a nozzle with a receptacle, the nozzlebeing configured to occupy a retracted position and an extendedposition.

According to some embodiments, the nozzle includes: a nozzle main body;a nozzle probe comprising a nozzle flat annular surface and a nozzlecheck sealing surface, the nozzle probe defining a nozzle inner void, anozzle check void, and one or more nozzle passageways leading from thenozzle inner void to the nozzle check void; a nozzle check assemblydisposed in the nozzle check void, the nozzle check assembly comprisinga nozzle check and a nozzle spring, the nozzle spring biasing the nozzlecheck assembly to a closed position where the nozzle check sealinglyengages the nozzle check sealing surface, wherein when the nozzle checkassembly is in the closed position, the nozzle check longitudinallyextends beyond the nozzle flat annular surface.

According to some embodiments, the receptacle includes: a receptaclemain body defining a receptacle main inner void; a receptacle springseat disposed in the receptacle main body, the receptacle spring seatdefining a receptacle central void; a receptacle stem at least partiallydisposed in the receptacle central void of the receptacle spring seat,the receptacle stem being at least partially disposed in the receptaclemain inner void; a receptacle poppet connected to the receptacle stem,the receptacle poppet comprising a receptacle inner check sealingsurface and defining a receptacle central inner check void; a receptaclespring disposed between the receptacle spring seat and the receptaclepoppet, the receptacle spring at least partially occupying thereceptacle main inner void, the receptacle spring biasing the receptaclepoppet to a closed position; a receptacle check assembly at leastpartially disposed in the receptacle inner check void, the receptaclecheck assembly comprising a receptacle check and a receptacle checkspring, the receptacle check spring biasing the receptacle check towarda closed position where the receptacle check engages the receptacleinner check sealing surface, the receptacle check protruding from thereceptacle poppet when the receptacle check is in the closed position.

According to some embodiments, method includes: equalizing pressurebetween the nozzle inner void and the receptacle main inner void bypressing the nozzle check against the receptacle check to open thenozzle check and the receptacle check; extending the nozzle into thereceptacle such that the receptacle main body surrounds at least aportion of the nozzle probe; flowing fluid from the nozzle inner voidinto the receptacle main inner void.

According to some embodiments, the method includes waiting for thepressure between the nozzle inner void and the receptacle main innervoid to equalize before extending the nozzle into the receptacle.

According to some embodiments, the step of inserting the nozzle into thereceptacle comprises pressing the nozzle flat annular surface of thenozzle probe against the receptacle poppet.

According to some embodiments, the receptacle poppet comprises areceptacle flat annular surface and the receptacle poppet defines areceptacle first void extending to the receptacle flat annular surface.

According to some embodiments, the nozzle check assembly comprises anozzle check seal.

According to some embodiments, the method comprises inserting the nozzlecheck seal into the receptacle first void prior to opening the nozzlecheck and prior to opening the receptacle check.

According to some embodiments, the step of equalizing pressure betweenthe nozzle inner void and the receptacle main inner void by pressing thenozzle check against the receptacle check to open the nozzle check andthe receptacle check comprises: opening the nozzle check prior toopening the receptacle check.

According to some embodiments, the receptacle comprises a receptacleannular packing compressed between the receptacle main body and thereceptacle poppet when the receptacle poppet is in the closed position,wherein when the nozzle is in the extended position, the receptacleannular packing is compressed between the nozzle main body and thereceptacle main body.

According to some embodiments, the method further includes causing thereceptacle annular packing to be compressed by the receptacle main body,the receptacle poppet, and the nozzle main body for at least a moment intime.

According to some embodiments, the receptacle comprises a receptacleadditional poppet and a receptacle additional spring, the receptacleadditional poppet being disposed downstream of the receptacle poppet,the receptacle additional spring biasing the receptacle additionalpoppet to a closed position.

According to some embodiments, the method includes opening thereceptacle additional poppet by pressurizing the receptacle main innervoid.

According to some embodiments, the method includes opening thereceptacle additional poppet by causing the receptacle stem to contact areceptacle stop, the receptacle stop being connected to the receptacleadditional poppet.

According to some embodiments, the method includes: determining, via oneor more sensors in electrical communication with a controller, when thenozzle reaches the extended position; via the controller, automaticallycausing fluid to flow from the nozzle into the receptacle when thecontroller determines that the nozzle has reached the extended position.The controller may be disposed in the nozzle.

According to some embodiments, each of the nozzle and the receptacleinclude a packing for sealing a fluid conduit, the packing comprising: apacking housing defining a longitudinally extending inner void and twoannular spring grooves; a ringed projection extending from the packinghousing; two circumferential springs disposed in the annular springgrooves.

Disclosed is a receptacle for receiving fluid, the receptaclecomprising: a main body, one end of the main body defining an outletport, an opposing end of the main body defining an inner void, and themain body comprising an inner sealing surface; a first poppet disposedin the main body, the first poppet comprising an annular seal; a firstspring seat disposed in the main body; a first spring disposed betweenthe first spring seat and the first poppet and biasing the first poppettoward a closed position where the annular seal engages the innersealing surface; wherein, when the first poppet is in the closedposition, the first poppet defines at least a portion of the inner void.

According to some embodiments, the receptacle includes a packing forsealing a fluid conduit, the packing comprising: a packing housingdefining a longitudinally extending inner void and two annular springgrooves; a ringed projection extending from the packing housing; twocircumferential springs disposed in the annular spring grooves.

According to some embodiments, the inner void is exposed to ambientatmosphere.

According to some embodiments, the inner void is annular.

According to some embodiments, the inner void is partially conical.

According to some embodiments, the receptacle further includes a checkassembly centrally disposed in the first poppet, the check assemblycomprising a check and a check spring, the check spring biasing thecheck to closed position where the check contacts an inner surface ofthe first poppet.

According to some embodiments, when the check is in the closed position,the check protrudes from the first poppet into the inner void.

According to some embodiments, the receptacle further includes: a secondspring seat disposed in the main body; a valve seat; a second poppet; asecond spring disposed between the second spring seat and the secondpoppet, the second spring biasing the second poppet to a closed positionwhere the second poppet contacts the valve seat.

According to some embodiments, the receptacle includes a stem connectedto the first poppet and extending through the valve seat, the firstspring seat, and the second poppet.

According to some embodiments, the main body defines a main inner voidin which the first spring is disposed, the first poppet defining one ormore passageways fluidly communicating the main inner void with thecheck spring.

Disclosed is an assembly comprising a nozzle coupled with a receptacle;the nozzle being configured to occupy a retracted position and anextended position.

According to some embodiments, the nozzle includes: a nozzle main body;a nozzle probe comprising a nozzle flat annular surface and a nozzlecheck sealing surface, the nozzle probe defining a nozzle inner void, anozzle check void, and one or more nozzle passageways leading from thenozzle inner void to the nozzle check void; a nozzle check assemblydisposed in the nozzle check void, the nozzle check assembly comprisinga nozzle check and a nozzle spring, the nozzle spring biasing the nozzlecheck assembly to a closed position where the nozzle check sealinglyengages the nozzle check sealing surface, wherein when the nozzle checkassembly is in the closed position, the nozzle check longitudinallyextends beyond the nozzle flat annular surface.

According to some embodiments, the receptacle includes: a receptaclemain body defining a receptacle main inner void; a receptacle springseat disposed in the receptacle main body, the receptacle spring seatdefining a receptacle central void; a receptacle stem at least partiallydisposed in the receptacle central void of the receptacle spring seat,the receptacle stem being at least partially disposed in the receptaclemain inner void; a receptacle poppet connected to the receptacle stem,the receptacle poppet comprising a receptacle inner check sealingsurface and defining a receptacle central inner check void; a receptaclespring disposed between the receptacle spring seat and the receptaclepoppet, the receptacle spring at least partially occupying thereceptacle main inner void, the receptacle spring biasing the receptaclepoppet to a closed position; a receptacle check assembly at leastpartially disposed in the receptacle inner check void, the receptaclecheck assembly comprising a receptacle check and a receptacle checkspring, the receptacle check spring biasing the receptacle check towarda closed position where the receptacle check engages the receptacleinner check sealing surface, the receptacle check protruding from thereceptacle poppet when the receptacle check is in the closed position.

According to some embodiments, the assembly is configured to: equalizepressure between the nozzle inner void and the receptacle main innervoid by pressing the nozzle check against the receptacle check to openthe nozzle check and the receptacle check; flow fluid from the nozzleinner void into the receptacle main inner void, upon extension of thenozzle into the receptacle such that the receptacle main body surroundsat least a portion of the nozzle probe.

According to some embodiments, each of the nozzle and the receptacleinclude a packing for sealing a fluid conduit, the packing comprising: apacking housing defining a longitudinally extending inner void and twoannular spring grooves; a ringed projection extending from the packinghousing; two circumferential springs disposed in the annular springgrooves.

Disclosed is a packing for sealing a fluid conduit, the packingcomprising: a packing housing defining a longitudinally extending innervoid and two annular spring grooves; a ringed projection extending fromthe packing housing; two circumferential springs disposed in the annularspring grooves.

According to some embodiments, each of the circumferential springs has alongitudinal axis collinear with a longitudinal axis of the packinghousing.

According to some embodiments, the packing housing only partiallysurrounds each of the circumferential springs such that each of thecircumferential springs is exposed to fluid located outside of thepacking.

According to some embodiments, the ringed projection comprises a firstring, a second ring, and a third ring, the first and second rings beingintegral with the packing housing.

According to some embodiments, the third ring is non-integral with thepacking housing.

According to some embodiments, the first and second rings form anannular groove for the third ring and the third ring is disposed in theannular groove.

According to some embodiments, the third ring protrudes from the annulargroove.

According to some embodiments, each of the circumferential springsinwardly bias a portion of the packing housing toward the inner void andoutwardly bias a portion of the packing housing away from the innervoid.

According to some embodiments, the packing housing and the ringedprojection comprise a flexible polymer and each of the circumferentialsprings comprise a metal.

The packing may be disposed in any of the above-described nozzles andreceptacles.

While specific embodiments of the invention have been described indetail, it will be appreciated by those skilled in the art that variousmodifications and alternatives to those details could be developed inlight of the overall teachings of the disclosure. Accordingly, theparticular arrangements disclosed are meant to be illustrative only andnot limiting as to the scope of the invention which is to be given thefull breadth of the appended claims and any equivalent thereof.

What is claimed is:
 1. A receptacle comprising: a main body; a firststem; a first poppet connected to the first stem; a valve seat disposedin the main body; a first spring configured to bias the first poppet toa first closed position; a second stem configured to slide relative tothe first poppet and the first stem; a second poppet connected to thesecond stem and defining a central void; a second spring configured tobias the second poppet to a second closed position; a check assembly atleast partially disposed in the central void of the second poppet, thecheck assembly comprising a check and a check spring, wherein the checkis moveable relative to the second poppet and the main body, and whereinthe check spring is configured to bias the check to a closed checkposition.
 2. The receptacle of claim 1, wherein at least one of thefirst poppet is threadably coupled to the first stem or the secondpoppet is threadably coupled to the second stem.
 3. The receptacle ofclaim 1, wherein the first poppet is configured to sealingly engage thevalve seat in the first closed position, the second poppet is configuredto sealingly engage the main body in the second closed position, and thecheck is configured to sealingly engage the second poppet in the closedcheck position.
 4. The receptacle of claim 1, further comprising aspring seat that is disposed in the main body.
 5. The receptacle ofclaim 4, wherein the spring seat defines a second central voidconfigured to slidably receive the first stem.
 6. The receptacle ofclaim 4, wherein the first stem includes a portion that is configured tostop against the spring seat to limit movement of the first stem and thefirst poppet away from the valve seat.
 7. The receptacle of claim 1,wherein the first stem and the first poppet define a longitudinal holeconfigured to slidably receive the second stem.
 8. The receptacle ofclaim 7, wherein the first stem includes a stop configured to contactthe second stem to limit movement of the second stem relative to thefirst stem.
 9. The receptacle of claim 8, wherein the first spring isconfigured to retain the first poppet in the first closed position untilthe second stem contacts the stop and pushes the first stem away fromthe valve seat.
 10. The receptacle of claim 1, wherein the second poppetdefines a plurality of communicating voids that fluidly connect thecentral void to an inlet port of the main body for pressure equalizationto reduce an amount of effort to open the second poppet.
 11. Thereceptacle of claim 10, wherein the first poppet is configured to openwhen: fluid pressure in the inlet port of the main body exerts a forceon the first poppet that exceeds a biasing force of the first spring; orthe second stem pushes the first stem away from the valve seat.
 12. Areceptacle comprising: a main body; a first stem; a first poppetconnected to the first stem; a valve seat disposed in the main body; afirst spring configured to bias the first poppet to a first closedposition; a second stem slidingly engaged to the first poppet and thefirst stem; a second poppet connected to the second stem; and a secondspring configured to bias the second poppet to a second closed position.13. The receptacle of claim 12, wherein at least one of the first poppetis threadably coupled to the first stem or the second poppet isthreadably coupled to the second stem.
 14. The receptacle of claim 12,wherein the first poppet is configured to sealingly engage the valveseat in the first closed position and the second poppet is configured tosealingly engage the main body in the second closed position.
 15. Thereceptacle of claim 12, further comprising a spring seat that isdisposed in the main body, wherein the spring seat is configured toslidably receive the first stem, and wherein the first stem includes aportion that is configured to stop against the spring seat to limitmovement of the first stem and the first poppet away from the valveseat.
 16. The receptacle of claim 12, wherein the first stem includes astop configured to contact the second stem to limit movement of thesecond stem relative to the first stem, and wherein the first spring isconfigured to retain the first poppet in the first closed position untilthe second stem contacts the stop and pushes the first stem away fromthe valve seat.
 17. The receptacle of claim 12, wherein the first poppetis configured to open when: fluid pressure in an inlet port of the mainbody exerts a force on the first poppet that exceeds a biasing force ofthe first spring; or the second stem pushes the first stem away from thevalve seat.
 18. A receptacle comprising: a main body; a stem; a poppetconnected to the stem and defining an inner check void; a springconfigured to bias the poppet to a closed poppet position; and a checkassembly at least partially disposed in the inner check void, the checkassembly comprising a check and a check spring, wherein the check isconfigured to move relative to the main body, wherein the check springis configured to bias the check toward a closed check position, whereinthe check has a first surface area and the poppet has a second surfacearea that is larger than the first surface area of the poppet such thata fluid force causes the check to move to an open check position beforecausing the poppet to move to an open poppet position.
 19. Thereceptacle of claim 18, further comprising a spring seat disposed in themain body.
 20. The receptacle of claim 19, wherein the stem is slidablyengaged with the spring seat.
 21. The receptacle of claim 19, whereinthe spring is disposed between the spring seat and the poppet.
 22. Thereceptacle of claim 18, wherein the poppet includes an inner checksealing surface.
 23. The receptacle of claim 22, wherein the check isconfigured to engage the inner check sealing surface in the closed checkposition.